Mobile external radio modem



FIG. 1 is a top, front and right side perspective view of a "Mobile External Radio Modem" showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a rear view elevational view thereof. 

The ornamental design for a mobile external radio modem, as shown and described. 